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grep for text and lines above and below

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# 1  
Old 12-15-2008
grep for text and lines above and below
hi all,
in ksh i wanted to grep for some text and also include a few lines above and below that text. how do i do that ???

i am trying to get my script to print out request and response from the server log file.

getting the request is easy, i just do a grep -i "request" from log but i need to pair that request with its response which is just 2 lines below the request.


thanks in advance.
# 2  
Old 12-15-2008
ksh, not sure you can with grep.
# 3  
Old 12-15-2008
Hammer & Screwdriver Can you post a sample of the log file
Perhaps 15-20 lines should be sufficient.
Sometimes, there are 'tricks' to fool a system into providing more lines.
# 4  
Old 12-15-2008
Depends on which version of grep you have:

Code:
$ grep --version
grep (GNU grep) 2.5.1

Under the help:
Context control:
  -B, --before-context=NUM  print NUM lines of leading context
  -A, --after-context=NUM   print NUM lines of trailing context
  -C, --context=NUM         print NUM lines of output context
  -NUM                      same as --context=NUM


$ cat file
0
10
34
34
54
122
58747
54
99
2
1
45

$ grep -C1 58747 file
122
58747
54

You should do a search on this forum to get alternate versions if you don't have GNU grep
This User Gave Thanks to SFNYC For This Post:
ds_biswas
# 5  
Old 12-15-2008
the part i am interested in from the log file is of the following structure :


REQUEST <SOAP-ENV:Envelope ...... </SOAP-ENV:Envelope>
[12/16/08 13:17:01:976 NZDT] 1c2c259 SystemOut O
[12/16/08 13:17:02:311 NZDT] 1c2c259 SystemOut O RESPONSE [335 millis]


ta.
# 6  
Old 12-16-2008
input:
Code:
likljasdf
lkasjf
line 1
line 2
line 3
asdfjkl
qwioru

output:
Code:
line 1
line 2
line 3

code:

Code:
sed -n '/line 2/ !{
h
}
/line 2/ {
H
n
H
x
p
}' a

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